Sawmill safety device.



P L. FOR BES. SAWMILL SAFETY DEVICE. APPLICATION FILED OCT- 5. I917- 1,2 63,221 Patented-A r. 16, 191&

Fig. 1

WITNESSES INVENTOR Wzw W "Kn-A mun: cenu M gage the end PERCY LLOYD FORBES, OF WEST MIDDLESEX, PENNSYLVANIA.

SAWMILL SAFETY DEVICE.

Application filed October 5, 1917.

To all whom it may concern:

Be it known that I, PERCY LLOYD Fonnns, a citizen of the United States, and resident of WestfwTlClCll-BSGX, in the county of Mercer and State of Pennsylvania, have invented certain new and useful Improvements in Sawmill Safety Devices, of which the following is a specification.

My invention pertains to means which prevent the vertically and longitudinally adjustable dogs which hold stable the log against the blocks preparatory to, and during the sawing operation from getting into the plane of the saw.

The objects of my invention are to obviate all the danger and loss consequent upon the movement of the dog into the plane of the saw, and to relieve the sawyer of the responsibility of determining whether the dog be in the path of the saw and thus conserve the time which would be consumed in the readjustment of the dog.

These objects will be elucidated by the drawings accompanying this specification in which Figure 1 is a side view in perspective, showing the knee equipped with my safety device, and Fig. 2 is atop view of the same.

Referring now to the figures of my invention in which like reference characters designate like parts, 1 is the block which supports the log during the sawing operation, 2 the knee which is slidably mounted on the block 1 and which is slidably adjustable either toward or from the plane of the saw when the gear wheel 7 on the shaft 6 is circumvolved at the will of the sawyer. The dog t and the frame 5 comprise the customary means for holding the log on the block 1, and are vertically and longitudinally adjustable along the vertical bar 3 at the release of the eccentric in the frame 5. This apparatus needs no further explanation since it is substantially the same as is customarily in use on all sawmills.

The apparatus provided for stopping the knee 2 in its movement toward the plane of the saw comprises a pin or rod 13 extending laterally from the dog 4: in a position to engage the vertical bar 8 in its movement toward the saw, a spring 12 designed to maintain the position of the bar 8 against and the knee 2, and the ad- 10 which is designed to enof the block 1 and thus reguthe upright 3 justing screw Specification of Letters latent.

Patented Apr. 16, 1918.

Serial No. 194,858.

late the maximum proximity of the dog a to the plane or path of the saw.

When, by the rotation of the gear wheel 7 on the shaft 6, the knee 2 has been slidably moved from the plane of the saw, the tension of the spring 12 firmly secures the retracted position of the upright 8 against the vertical bar 3, where it does not hinder or retard the vertical or longitudinal adjustment of the dog. When all the dogging mechanism is in readiness for the inauguration of the sawing operation, the operator moves the knee 2 inward toward the path of the saw, and the bar 8, secured to the knee 2 by the clamps 9, moves conjunctively with the said knee 2, until the adjusting screw 10 engages the end of the block 1. Then the further progress of the bar 8 is prevented and, at the continued movement of the said knee toward the saw, the bar 8 is drawn from its retracted position against the vertical bar 3 and is slidably moved outwardly therefrom through the clamps 9. As the knee and the dog 4t continue in their progress toward the plane of the saw, the intervening distance between the upright 8 and the laterally extending pin 13 on said dog is diminished relatively thereto. When the pin 13 engages the upright 8, all further outward movement of the dog 1 is effectually stopped and the sawyer is thereby apprised of the need of longitudinal readjustment of the dog.

By a simple adjustment of the screw 10, the sawyer may regulate the relative distance which will intervene between the dog 1 and the saw when the lateral pin 13 engages the upright danger of contact. It may thus be readily seen that the possibilities of the dog being drawn into the plane of the saw, as well as the danger and loss resulting therefrom, will be entirely obviated and the danger ordinarily attending the sawing operation will be in large part minimized.

Having thus described my I claim and desire to secure ent is 1. In a sawmill safety device, a longitudinally and vertically adjustable dog with a pin or rod extending laterally therefrom, an upright bar designed to engage the said pin on the said dog, means to secure the position of said upright bar, and means designed to stop the progress of said upright invention, what by Letters Pat- 8, and thus obviate the bar and bring about its contact with the pin laterally extending from the said dog 2. In a safety device for sawmills, the combination of a vertically and longitudi- 5 nally adjustable dog with a pin extending laterally therefrom an upright bar designed to engage said pin on said dog, means to secure the position of said upright, and means for regulating the maximum horizonlo tal progress of the dog toward the saw, as

hereinbefore described.

In testimony that the above specification is correct, I have hereunto signed my name in the presence of two witnesses, at West Middlesex, in the county of Mercer and 1 State of Pennsylvania, this 4th day of October, 1917.

PERCY LLOYD FORBES.

Witnesses:

W. J oHNsoN, J. C. HARSHMAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G. 

